The VSP 8600 is a modular chassis system, supporting a field-replaceable, hot-swappable capability on all system hardware components. Ethernet connectivity is delivered by the addition of one or more interface modules, referred to as IOC modules. The VSP 8600 runs the VSP Operating System Software. The VSP 8608 chassis features eight slots for IOC modules, plus three central slots reserved for switch fabric modules; all are accessible from the front of the chassis. The VSP 8608 chassis is very low-profile, given the capacity and density, occupying just seven RU of height in a standard 19" rack. The VSP 8600 adds significant flexibility to the Avaya Networking portfolio, and is compatible with, and complementary to, existing products and technologies. It is Avaya's next-generation, high-performance chassis-based modular Ethernet switching platform. It is positioned as a highly scalable platform delivering a broad range of interface connectivity, and focused primarily for demanding Core/Spine Switch applications in the campus and data center. To this end, the VSP 8600's architecture features deep packet buffers that accommodate bursty traffic and deliver lossless performance.